Question: Where is the position of office held by head of the organisation of World Trade Organization
Paraphrase: Where is the role of office held via head of the company of World Trade Organization
SPARQL (Wikidata):  select distinct ?obj where { wd:Q7825 wdt:P2388 ?obj . ?obj wdt:P31 wd:Q4164871 } 
Answer: Director-General of the World Trade Organization